📄 os_cpu_c.c
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/*
*********************************************************************************************************
* uC/OS-II
* The Real-Time Kernel
*
* (c) Copyright 1992-2002, Jean J. Labrosse, Weston, FL
* All Rights Reserved
*
* File : OS_CPU_C.C
* By : Jean J. Labrosse
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* ARM Port
*
* Target : ARM (Includes ARM7, ARM9)
* Ported by : Michael Anburaj
* URL : http://geocities.com/michaelanburaj/ Email : michaelanburaj@hotmail.com
*
*********************************************************************************************************
*/
#define OS_CPU_GLOBALS
#include "includes.h"
#include "44blib.h"
#include "44b.h"
/*
*********************************************************************************************************
* OS INITIALIZATION HOOK
* (BEGINNING)
*
* Description: This function is called by OSInit() at the beginning of OSInit().
*
* Arguments : none
*
* Note(s) : 1) Interrupts should be disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203
void OSInitHookBegin (void)
{
}
#endif
/*
*********************************************************************************************************
* OS INITIALIZATION HOOK
* (END)
*
* Description: This function is called by OSInit() at the end of OSInit().
*
* Arguments : none
*
* Note(s) : 1) Interrupts should be disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203
void OSInitHookEnd (void)
{
}
#endif
/*
*********************************************************************************************************
* TASK CREATION HOOK
*
* Description: This function is called when a task is created.
*
* Arguments : ptcb is a pointer to the task control block of the task being created.
*
* Note(s) : 1) Interrupts are disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0
void OSTaskCreateHook (OS_TCB *ptcb)
{
ptcb = ptcb; /* Prevent compiler warning */
}
#endif
/*
*********************************************************************************************************
* TASK DELETION HOOK
*
* Description: This function is called when a task is deleted.
*
* Arguments : ptcb is a pointer to the task control block of the task being deleted.
*
* Note(s) : 1) Interrupts are disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0
void OSTaskDelHook (OS_TCB *ptcb)
{
ptcb = ptcb; /* Prevent compiler warning */
}
#endif
/*
*********************************************************************************************************
* IDLE TASK HOOK
*
* Description: This function is called by the idle task. This hook has been added to allow you to do
* such things as STOP the CPU to conserve power.
*
* Arguments : none
*
* Note(s) : 1) Interrupts are enabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0 && OS_VERSION >= 251
void OSTaskIdleHook (void)
{
}
#endif
/*
*********************************************************************************************************
* STATISTIC TASK HOOK
*
* Description: This function is called every second by uC/OS-II's statistics task. This allows your
* application to add functionality to the statistics task.
*
* Arguments : none
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0
void OSTaskStatHook (void)
{
}
#endif
/*
*********************************************************************************************************
* INITIALIZE A TASK'S STACK
*
* Description: This function is called by either OSTaskCreate() or OSTaskCreateExt() to initialize the
* stack frame of the task being created. This function is highly processor specific.
*
* Arguments : task is a pointer to the task code
*
* pdata is a pointer to a user supplied data area that will be passed to the task
* when the task first executes.
*
* ptos is a pointer to the top of stack. It is assumed that 'ptos' points to
* a 'free' entry on the task stack. If OS_STK_GROWTH is set to 1 then
* 'ptos' will contain the HIGHEST valid address of the stack. Similarly, if
* OS_STK_GROWTH is set to 0, the 'ptos' will contains the LOWEST valid address
* of the stack.
*
* opt specifies options that can be used to alter the behavior of OSTaskStkInit().
* (see uCOS_II.H for OS_TASK_OPT_???).
*
* Returns : Always returns the location of the new top-of-stack' once the processor registers have
* been placed on the stack in the proper order.
*
* Note(s) : Interrupts are enabled when your task starts executing. Also that the tasks run in SVC
* mode.
*********************************************************************************************************
*/
OS_STK *OSTaskStkInit (void (*task)(void *pd), void *pdata, OS_STK *ptos, INT16U opt)
{
OS_STK *stk;
opt = opt; /* 'opt' is not used, prevent warning */
stk = ptos; /* Load stack pointer */
*(stk) = (OS_STK)task; /* Entry Point */
*(--stk) = (INT32U)0; /* lr */
*(--stk) = (INT32U)0; /* r12 */
*(--stk) = (INT32U)0; /* r11 */
*(--stk) = (INT32U)0; /* r10 */
*(--stk) = (INT32U)0; /* r9 */
*(--stk) = (INT32U)0; /* r8 */
*(--stk) = (INT32U)0; /* r7 */
*(--stk) = (INT32U)0; /* r6 */
*(--stk) = (INT32U)0; /* r5 */
*(--stk) = (INT32U)0; /* r4 */
*(--stk) = (INT32U)0; /* r3 */
*(--stk) = (INT32U)0; /* r2 */
*(--stk) = (INT32U)0; /* r1 */
*(--stk) = (INT32U)pdata; /* r0 : argument */
*(--stk) = (INT32U)(SVC32MODE|0x0); /* PSR */
*(--stk) = (INT32U)(SVC32MODE|0x0); /* SPSR */
return (stk);
}
/*
*********************************************************************************************************
* TASK SWITCH HOOK
*
* Description: This function is called when a task switch is performed. This allows you to perform other
* operations during a context switch.
*
* Arguments : none
*
* Note(s) : 1) Interrupts are disabled during this call.
* 2) It is assumed that the global pointer 'OSTCBHighRdy' points to the TCB of the task that
* will be 'switched in' (i.e. the highest priority task) and, 'OSTCBCur' points to the
* task being switched out (i.e. the preempted task).
*********************************************************************************************************
*/
#if (OS_CPU_HOOKS_EN > 0) && (OS_TASK_SW_HOOK_EN > 0)
void OSTaskSwHook (void)
{
}
#endif
/*
*********************************************************************************************************
* OS_TCBInit() HOOK
*
* Description: This function is called by OS_TCBInit() after setting up most of the TCB.
*
* Arguments : ptcb is a pointer to the TCB of the task being created.
*
* Note(s) : 1) Interrupts may or may not be ENABLED during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203
void OSTCBInitHook (OS_TCB *ptcb)
{
ptcb = ptcb; /* Prevent Compiler warning */
}
#endif
/*
*********************************************************************************************************
* TICK HOOK
*
* Description: This function is called every tick.
*
* Arguments : none
*
* Note(s) : 1) Interrupts may or may not be ENABLED during this call.
*********************************************************************************************************
*/
#if (OS_CPU_HOOKS_EN > 0) && (OS_TIME_TICK_HOOK_EN > 0)
void OSTimeTickHook (void)
{
}
#endif
INT32U OSIntCtxSwFlag = 0; /* Used to flag a context switch */
/* Initialize an ARM Target board */
void ARMTargetInit(void)
{
sys_init(); /* Initial 44B0X's Interrupt,Port and UART */
/* ---------------- print To UART0 ---------------- */
uHALr_printf("\n*==================================*\n");
uHALr_printf("*= 深圳市英蓓特信息技术有限公司 =*\n");
uHALr_printf("*==================================*\n");
uHALr_printf("*========== 产品研发中心 ==========*\n");
uHALr_printf("*======= 86-755-25631365 ========*\n");
uHALr_printf("*===== support@embedinfo.com ======*\n");
uHALr_printf("*=== OS Version:%d ===*\n\r",OSVersion());
uHALr_printf(" uCOS-II Running... \n") ;
/* ---------------- interrupts DEMO handler initialization ---------------- */
uHALr_InitInterrupts();
uHALr_InitTimers();
} /* targetInit */
//timer interrupt handler routine
extern void TickHandler(void);
extern void Handle_Eint1(void);
extern void Handle_Eint4567(void);
/* start the ARM target running */
void ARMTargetStart(void)
{
/* request the system timer */
if (uHALr_RequestSystemTimer((void *) OSTimeTick,
(const unsigned char *)"uCOS-II") <= 0)
uHALr_printf("Timer/IRQ busy\n");
RegisterIrqHandler(HandlerTIMER0, (void *) TickHandler);
//RegisterIrqHandler(HandlerEINT1, (void *) Handle_Eint1);
RegisterIrqHandler(HandlerEINT4567, (void *) Handle_Eint4567);
SysENInterrupt(BIT_TIMER0|BIT_EINT4567);//|BIT_EINT1
}
void UserIRQ_Eint4567(void)
{
OSSemPend(UART_sem, 0, 0);
Uart_Printf(" SB2 or SB3 had pressed...\r");
OSSemPost(UART_sem);
Eint4567Isr();
}
void UserIRQ_Eint1(void)
{
KeyboardInt();
}
void Timer0Interrupt()
{
rI_ISPC=BIT_TIMER0; // Clear pending bit -- Watchdog timer
OSTimeTick();
}
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